﴿ وَتَتَّخِذُونَ مَصَانِعَ لَعَلَّكُمْ تَخْلُدُونَ ﴾

“and make for yourselves mighty castles, [hoping] that you might become immortal?”

(And seek ye out strongholds) houses, palaces and pools, (that haply ye may last for ever) in this worldly life? Nay, you will not last for ever!